Ultraslow shock waves of electron density in LiNbO3 crystals |
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Authors: | Gronenborn S Sturman B Falk M Haertle D Buse K |
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Affiliation: | Institute of Physics, University of Bonn, Wegelerstrasse 8, D-53115 Bonn, Germany. |
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Abstract: | We show, experimentally and theoretically, that the application of modest voltages, U0=(0.1-1) kV, to LiNbO3ratioFe crystals at sufficiently high temperatures, T approximately (550-700) degrees C, leads to the formation of ultraslow shock waves (moving discontinuities) of the electron density owing to the removal of electrons from Fe2+ centers. Behind the sharp wave front, almost all iron centers are in the Fe3+ state, the sample is optically transparent, and its transport properties are strongly modified. The front velocity decreases during the propagation; it is controlled by the electron mobility. |
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